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Displaying 121 – 140 of 445

Smooth linearization of germs of $R^{2}$ -actions and holomorphic vector fields

F. Dumortier, Robert Roussarie (1980)

Annales de l'institut Fourier

The paper contains a generic condition permitting the linearization in class $𝒞^{k}$ , $0 \leq k \leq \infty$ , of germs of singular infinitesimal $R^{2}$ -actions on $R^{n}$ $(n \geq 2)$ and of singular holomorphic...

Smooth models of Thurston's pseudo-Anosov maps

Marlies Gerber, Anatole Katok (1982)

Annales scientifiques de l'École Normale Supérieure

Smooth spheres in IR4 with four critical points are standard.

Martin Scharlemann (1985)

Inventiones mathematicae

Smooth structures on algebraic surfaces with finite fundamental group.

Ian Hambleton, Matthias Kreck (1990)

Inventiones mathematicae

Smooth structures on Pi-manifolds

Samuel Omoloye Ajala (2004)

Kragujevac Journal of Mathematics

Smooth structures on sphere bundles over spheres.

Ajala, Samuel Omoloye (1988)

International Journal of Mathematics and Mathematical Sciences

Smooth sturctures on algebraic surfaces with cyclic fundamental group.

Ian Hambleton, Matthias Kreck (1988)

Inventiones mathematicae

Smoothability of proper foliations

John Cantwell, Lawrence Conlon (1988)

Annales de l'institut Fourier

Compact, $C^{2}$ -foliated manifolds of codimension one, having all leaves proper, are shown to be $C^{\infty}$ -smoothable. More precisely, such a foliated manifold is homeomorphic to one of class $C^{\infty}$ . The corresponding statement is false for foliations with nonproper leaves. In that case, there are topological distinctions between smoothness of class $C^{r}$ and of class $C^{r + 1}$ for every nonnegative integer $r$ .

Smoothing 4-Manifolds.

R. Lashof, J.L. Shaneson (1971)

Inventiones mathematicae

Smoothing H-spaces.

Erik Kjaer Pedersen (1978)

Mathematica Scandinavica

Smoothing H-spaces II.

Erik Kjaer Pedersen (1980)

Mathematica Scandinavica

Smoothing of real algebraic hypersurfaces by rigid isotopies

Alexander Nabutovsky (1991)

Annales de l'institut Fourier

Define for a smooth compact hypersurface $M^{n}$ of $R^{n + 1}$ its crumpleness $κ (M^{n})$ as the ratio ${diam}_{R^{n + 1}} (M^{n}) / r (M^{n})$ , where $r (M^{n})$ is the distance from $M^{n}$ to its central set. (In other words, $r (M^{n})$ is the maximal radius of an open non-selfintersecting tube around $M^{n}$ in $R^{n + 1} .)$ We prove that any $n$ -dimensional non-singular compact algebraic hypersurface of degree $d$ is rigidly isotopic to an algebraic hypersurface of degree $d$ and of crumpleness $\leq exp (c (n) d^{α (n) d^{n + 1}})$ . Here $c (n)$ , $α (n)$ depend only on $n$ , and rigid isotopy means an isotopy passing only through hypersurfaces of degree...

Smoothly equivalent real analytic proper G-mainfolds are subanalytically equivalent.

Sören Illmann (1996)

Mathematische Annalen

Smoothness and geometry of boundaries associated to skeletal structures I: sufficient conditions for smoothness

James Damon (2003)

Annales de l’institut Fourier

We introduce a skeletal structure $(M, U)$ in $ℝ^{n + 1}$ , which is an $n$ - dimensional Whitney stratified set $M$ on which is defined a multivalued “radial vector field” $U$ . This is an extension of notion of the Blum medial axis of a region in $ℝ^{n + 1}$ with generic smooth boundary. For such a skeletal structure there is defined an “associated boundary” $ℬ$ . We introduce geometric invariants of the radial vector field $U$ on $M$ and a “radial flow” from $M$ to $ℬ$ . Together these allow us to provide sufficient numerical conditions for...

Currently displaying 121 – 140 of 445

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Displaying 121 – 140 of 445

Smooth linearization of germs of $R^{2}$ -actions and holomorphic vector fields

Smooth models of Thurston's pseudo-Anosov maps

Smooth spheres in IR4 with four critical points are standard.

Smooth structures on algebraic surfaces with finite fundamental group.

Smooth structures on Pi-manifolds

Smooth structures on sphere bundles over spheres.

Smooth sturctures on algebraic surfaces with cyclic fundamental group.

Smoothability of proper foliations

Smoothing 4-Manifolds.

Smoothing H-spaces.

Smoothing H-spaces II.

Smoothing of real algebraic hypersurfaces by rigid isotopies

Smoothly equivalent real analytic proper G-mainfolds are subanalytically equivalent.

Smoothness and geometry of boundaries associated to skeletal structures I: sufficient conditions for smoothness

SO3 (...)-representation curves for two-bridge knot groups.

Solution of the problem of describing minimal Seifert manifolds.

Solvable Groups that are Simply Connected at ... .

Solvable systems of equations modeled on some spines of 3-manifolds.

Some analogies between number theory and dynamical systems on foliated spaces.

Some applications of Coincidence theory.

Currently displaying 121 – 140 of 445